[geary/wip/713150-conversations] (20 commits) ...Merge branch 'master' into wip/713150-conversations

[Jim Nelson <jnelson src gnome org>]

Summary of changes:

  dcfecbb... Updated Czech translation (*)
  ffe729f... Updated Czech translation (*)
  58979ee... Updated Polish translation (*)
  0dc8290... Updated Hungarian translation (*)
  35c139e... Updated Spanish translation (*)
  4569108... Only use Canonical's time format setting when running Unity (*)
  5ba069e... Revert "Fix find_boundaries_async in search, imap-engine Fo (*)
  de491f7... Rearrange nesting of paneds (*)
  4139076... Allow changing orientation of left paned (*)
  b32fa78... Place the status bar in the bottom left paned child (*)
  8b00d84... Don't resize conversations_paned on initial set up (*)
  1aabd9a... Fix frame borders in vertical orientation (*)
  97b0abb... Fix version check for MAJOR_VERSION > 3 (*)
  f9c187a... Updated Hebrew translation (*)
  244c197... Mark another string as translatable (*)
  8d6bf06... Updated Hebrew translation (*)
  be39ee5... Updated Hebrew translation (*)
  0d82845... Updated Hebrew translation - typo (*)
  bba7c38... Fix possible race condition when filling conversation windo
  dd3478e... Merge branch 'master' into wip/713150-conversations

(*) This commit already existed in another branch; no separate mail sent